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Comparison of negative-ion ESI-CID product-ion tandem mass spectra of two saturated pentsaccharides (5-mer) obtained from radical depolymerization of hyaluronan. a. Pentsaccharide GlcA-GlcNAc-GlcA-GlcNAc-GlcA with m/z 951.0 and b. Pentsaccharide GlcNAc-GlcA-GlcNAc-GlcA-GlcNAc with m/z 977.9. The sequence together with the glycosidic oxygens is shown indicating the proposed fragmentation.
